Terminal stock price display with Go
Programming Snapshot – Terminal Stock Portfolio

© Lead Image © Jakub Krechowicz, 123RF.com
Instead of pulling up a browser to check his investments, Mike Schilli tracks stock prices with the help of a Go program to display graphs in the terminal.
According to US Vice President Kamala Harris, most US citizens would run out of money if faced by only $400 of unexpected costs. Since hearing this, I have made it my job to check every day whether I still have sufficient financial reserves. This includes tracking the current share price performance of some well-known companies. While there are many apps with portfolio settings that monitor a number of selected shares, I prefer to use command-line tools written in Go that run in a terminal window.
Figure 1 shows the output of the Go Pofo program (Pofo stands for portfolio). The Pofo program's output displays in six tiles (three at the bottom and three at the top), with each tile containing a bar chart to illustrate the share price performance of Apple, Netflix, Meta, Amazon, Tesla, and Google over the past six weeks. The program grabs the current and historical share price data from the data dealer Twelve Data [1] in a fraction of a second shortly after launching. Twelve Data offers a free basic plan for hobbyists that allows up to eight requests per minute and up to 800 per day before a limit kicks in.
The program fetches the closing prices in US dollars of the six monitored shares on the New York Stock Exchange for the past 45 business days. It does so in one fell swoop with a single request to the server. Figure 2 shows the data for the hyper-nervous Netflix stock in the period between June 16 and July 31, 2023. In this time frame, the value of the share fluctuated wildly between $413.17 and $477.59. Alas, in a graph of absolute values, it is still more or less impossible to see any fluctuations, because, after all, the difference only accounts for around 15 percent of the total value.
[...]
Buy this article as PDF
(incl. VAT)
Buy Linux Magazine
Subscribe to our Linux Newsletters
Find Linux and Open Source Jobs
Subscribe to our ADMIN Newsletters
Support Our Work
Linux Magazine content is made possible with support from readers like you. Please consider contributing when you’ve found an article to be beneficial.

News
-
Linux Kernel 6.17 Drops bcachefs
After a clash over some late fixes and disagreements between bcachefs's lead developer and Linus Torvalds, bachefs is out.
-
ONLYOFFICE v9 Embraces AI
Like nearly all office suites on the market (except LibreOffice), ONLYOFFICE has decided to go the AI route.
-
Two Local Privilege Escalation Flaws Discovered in Linux
Qualys researchers have discovered two local privilege escalation vulnerabilities that allow hackers to gain root privileges on major Linux distributions.
-
New TUXEDO InfinityBook Pro Powered by AMD Ryzen AI 300
The TUXEDO InfinityBook Pro 14 Gen10 offers serious power that is ready for your business, development, or entertainment needs.
-
Danish Ministry of Digital Affairs Transitions to Linux
Another major organization has decided to kick Microsoft Windows and Office to the curb in favor of Linux.
-
Linux Mint 20 Reaches EOL
With Linux Mint 20 at its end of life, the time has arrived to upgrade to Linux Mint 22.
-
TuxCare Announces Support for AlmaLinux 9.2
Thanks to TuxCare, AlmaLinux 9.2 (and soon version 9.6) now enjoys years of ongoing patching and compliance.
-
Go-Based Botnet Attacking IoT Devices
Using an SSH credential brute-force attack, the Go-based PumaBot is exploiting IoT devices everywhere.
-
Plasma 6.5 Promises Better Memory Optimization
With the stable Plasma 6.4 on the horizon, KDE has a few new tricks up its sleeve for Plasma 6.5.
-
KaOS 2025.05 Officially Qt5 Free
If you're a fan of independent Linux distributions, the team behind KaOS is proud to announce the latest iteration that includes kernel 6.14 and KDE's Plasma 6.3.5.